Income Taxes Changes in Unrecognized Tax Benefits (Details) (Federal and State [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Federal and State [Member]
Changes in Unrecognized Tax Benefits [Line Items]
Unrecognized Tax Benefits	$ 291	$ 137	$ 133
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	4	1
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	(10)	(2)
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	171	45
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	(2)	(34)
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	$ (9)	$ (6)